In order to better know the climatic characteristics and trend of research area and cope with relevant work on climate change, the paper used the average monthly temperature and precipitation data at Yining station from 1952 to 2011,and took linear trend analysis and difference plot curve methods to analyze the inter annual, inter-decadal variation characteristics and mutation characteristics. It is found that the average in Yili station shows the tendency of fluctuation increase.The temperature go up obviously in spring and winter.The linear trend rate of average temperature of is 0.43℃/10a;The annual average rainfall shows a trend of fluctuated growing which is obvious in autumn and winter.The linear trend of annual average precipitation is 13.0mm/10a;The temperature has increased greatly since 1970's.The precipitation shows the volatility trends of decrease first and then increase,there was a decreasing trend from 1950's to 1970's and increase trend. The precipitation shows an increasing trend from 1990's to 21st century and obviously increases in 21st century;Based on the difference plot curve method, the climate characteristics presented a transition trend from the last warm dry to warm wet now.The trend has been clear since 1997.